Flotation process



United States Pat ent 3,425,549 FLOTATION PROCESS Woodrow J. Dickson, La Habra, and Fred W. Jenkins, Buena Park, Calif., assignors to Petrolite Corporation, Wilmington, DeL, a corporation of Delaware No Drawing. Continuation of application Ser. No. 115,882, June 9, 1961. This application Mar. 4, 1966, Ser. No. 531,791 U.S. Cl. 209-166 24 Claims Int. Cl. B03d 1/00 ABSTRACT OF THE DISCLOSURE Froth flotation process for beneficiating ore material, such as phosphate rock, containing siliceous material, such as silica, wherein the ore material is subjected to froth flotation in the presence of a minor amount of a collector such as a linear polymer of 1,2-alkyleneimine, said polymerhaving a molecular weight of at least 800 and each alkylene unit having 2-20 carbon atoms, such as polyethyleneimine and polypropyleneimine, and derivatives thereof, such as oxyalkylated, alkylated, olefinated, Schitf base reaction product, etc., derivatives thereof.

This application is a division of application Ser. No. 47,387, filed on August 4, 1960, now abandoned as an application, and is copending with application Ser. No. 458,373, filed on May 24, 1965, now abandoned, as a division of said application Ser. No. 458,373, and is also a continuation of application Ser. No. 115,882, filed on June 9, 1961, now abandoned, and is copending with each of the following applications:

Ser.No. Filing date Title 1. 505,037 Oct. 24, 1965 Fuel Composition 2. 115,876 June 9, 1961 Process of Preventing Scale 3. 115,877 June 9, 1961 Process of Breaking Emulsions 4. 505,039 Oct. 24, 1965 Preventing Corrosion 5. 115,878 June 9, 1961 Lubricating Composition 6. 115,881 June 9, 1961 Inhibiting Foam 7. 115,883 June 9, 1961 Drilling Fluids 8. 115,884 June 9, 1961 Treatment of Oil Wells 9. 308,063 Sept. 11, 1963 Anti-Stripping Agents Applications Ser. No. 115,877, 115, 881, 115,883, and 115,884 are now abandoned.

Application Ser. No. 115,876 has been issued as U.S. Patent No. 3,251,778 on May 17, 1966.

Application Ser. No. 505,039 has been issued as U.S. Patent No. 3,262,791 on July 26, 1967.

Application Ser. No. 115,878 has been issued as U.S. Patent No. 3,301,783 on Jan. 31, 1967.

Application Ser. No. 308,063 has been issued :as U.S. Patent No. 3,259,513 on July 5, 1966.

Filed on Mar. 4, 1966 in the United States Patent Oflice simultaneously with and copending with this application are the following:

1. Application Ser. No. 531,793 filed as a continuation of application Ser. No. 115,877 and issued as U.S. Patent No. 3,344,083 on Sept. 26, 1967;

Cir

ice

2. Application Ser. No. 531,792 filed as a continuation of application Ser. No. 115,881 and issued as U.S. Patent No. 3,313,736 on Apr. 11, 1967;

3. Application Ser. No. 531,795 filed as a continuation of application Ser. No. 115,883, now Patent No. 3,346,- 489; and

4. Application Ser. No. 531,794 filed as a continuation of application Ser. No. 115,884 and issued as U.S. Patent No. 3,347,789 on Oct. 17, 1967.

This invention relates to polyalkyleneimines and to derivatives thereof. More particularly, this invention relates to polyethyleneimine and to polyethyleneimine derivatives containing various groups, such as the oxyalkylated, acylated, alkylated, carbonylated, olefinated, etc., derivatives thereof, prepared by introducing such groups individually, alternately, in combination, etc., including for example, derivatives prepared by varying the order of adding such groups, by increasing the number and order of adding such groups, and the like.

This invention also relates to methods of using these products, which have an unexpectedly broad spectrum of uses, for example, as demulsifiers for Water-in-oil emulsions; as demulsifiers for oil-in-water emulsions; as corrosion inhibitors; as fuel oil additives for gasoline, diesel fuel, jet fuel, and the like; as lubricating oil additives; as scale preventatives; as chelating agents or to form chelates which are themselves useful, for example, as antioxidants, gasoline stabilizers, fungicides, etc.; as flotation agents, for example, as flotation collection agents; as asphalt additives or anti-stripping agents for asphaltmineral aggregate compositions; as additives for compositions useful in acidizing calcareous stratas of oil wells; as additives for treating water used in the secondary recovery of oil and in disposal wells; as additives used in treating oilwell stratain primary oil recovery to enhance the flow of oil; as emulsifiers for both oil-in-water and water-in-oil emulsions; as additives for slushing oils; as additives for cutting oils; as additives for oil to prevent emulsification during transport; as additives for drilling muds; as agents useful in removing mud sheaths from newly drilled wells; as dehazing or fog-inhibiting agents for fuels; as additives for preparing sand or mineral slurries useful in treating oil wells to enhance the recovery of oil; as agents for producing polymeric emulsions useful in preparing water-vapor impermeable paper board; as agents in parafiin solvents; as agents in preparing thickened silica aerogel lubricants; :as gasoline additives to remove copper therefrom; as deicing and anti-stalling agents for gasoline; as antiseptic, preservative, bactericidal, bacterisostatic, germicidal, fungicidal agents; as agents for the textile industry, for example, as mercerizing assistants, as wetting agents, as rewetting agents, as dispersing agents, as detergents, as penetrating agents, as softening agents, as dyeing assistants, as anti-static agents, and the like; as additives for rubber latices; as entraining agents for concrete and cements; as anti-static agents for rugs, floors, upholstery, plastic and wax polishes, textiles, etc.; as detergents useful in metal cleaners, in floor oils, in dry cleaning, in general cleaning, and the like; as agents useful in leather processes such as in fiat liquoring, pickling, acid degreasing, dye fixing, and the like; as agents in metal pickling; as additives in paints for improved adhesion of primers, in preventing water-spotting in lacquer;

as anti-Skinners for pigment flushing, grinding and dispersing, as antifeathering agents in ink; as agents in the preparation of wood pulp and pulp slurries, as emulsifiers for insecticidal compositions and agricultural sprays such as DDT, 24-D (Toxaphene), chlordane, nicotine sulfate, hexachloracyclohexane, and the like; as agents useful in building materials, for example, in the water repellent treatment of plaster, concrete, cement, roofing materials, floor sealers; as additives in bonding agents for various insulating building materials; and the like.

Polyalkyleneimine employed in this invention include high molecular weight polyethyleneimine, i.e. polymers of ethyleneimine,

or substituted products thereof:

wherein R, R and R" are hydrogen or a substituted group, for example a hydrocarbon group such as alkyl, cycloalkyl, aryl, aralkyl, alkaryl, etc., but preferably hydrogen or alkyl.

Thus, polyethyleneimine is polymerized, substituted or an unsubstituted, 1,2-alkyleneimine. Although polyethyleneimine is the preferred embodiment, other illustrative examples include, for example,

CH-CHB 1,2-propyleneimlne C H-C 2H 1,2-bu'tyleneimine C HC H3 CIT-CH3 2,3bu'tyleneimine 0 H3 HN\ CH3 1,ldln1ethylethylimine CHC 4H I-IN C-butylethyleneimine CHC12H25 IIN C-do decylethyleneimine CHC16HJ7 HN\ CH3 C-octadecylethylenelmlne A preferred class of polymerized 1,2 alkylenemines include those derived from polymerizing RCHRCH H wherein R and R are hydrogen or an alkyl radical, the latter being the same or different. Of the substituted ethyleneimines, propyleneimines are preferred.

Cal

The polyethyleneimines useful herein have molecular weights of, for example, at least 800, for example from 800 to 100,000 or higher, but preferably 20,000 to 75,000 or higher. There is no upper limit to the molecular weight of the polymer employed herein and molecular weights of 200,000, 500,000 or 1,000,000 or more can be employed. 1

The optimum molecular weight will depend on the particular derivative, the particular use, etc.

Although these products are generally prepared by polymerizing 1,2 alkyleneimines, they may also be prepared by other known methods, for example, by decarboxylating 2-oxazolidine as described in 2,806,839, etc.

Commercial examples of these compounds are available, for example, those sold by the Chemirad Corporation as FBI in a 50% by weight aqueous solution having a molecular weight of 3040,000. Propyleneimine is also commercially available and suitable polymers can be prepared from this material.

For convenience and simplicity, this invention will be illustrated by employing polyethyleneimine.

Polyethyleneimine is a well known polymer whose preparation from ethyleneimine is described in US. Patent 2,182,306 and elsewhere. For convenience in polymerizing and handling, the polymer is generally prepared as an aqueous solution. Water can be removed, if desired, by distilling the water therefrom or by azeotroping the water therefrom in the presence of a hydrocarbon, such as xylene, and using the solution and/or suspension obtained thereby for further reaction or use. The following polyethyleneimines of the molecular weights indicated are employed herein to illustrate this invention.

Polymer Designation Approx. Mol. Wgt. Range Polyethyleneimine 900 800-1000 Polyethyleneimine 5,000 4000-6000 Polyethyleneimine 11,500 10,500l2,500 Polyethyleneimine 20,000 18,000-22,000 Polyethyleneimine 35,000 30,000-40,000

Polyethyleneimine 50,000 40,00060,000 Polyethyleneimine 75,000 65,000-85,000 Polyethyleneimine 100,000 80,000-125,000

ACYLATION A wide variety of acylating agents can be employed. Acylation is carried out under dehydrating conditions, i.e., water is removed. Any of the well-known methods of acylation can be employed. For example, heat alone, heat and reduced pressure, heat in combination with an azeotroping agent, etc., are all satisfactory.

The temperature at which reaction between the acylating agent and polyethyleneimine is elfected is not too critical a factor. Since the reactions involved appear to be an amide-formation reaction and a condensation reaction, the general temperature conditions for such reactions, which are well known to those skilled in the art, are applicable.

Acylation is conducted at a temperature sufficiently high to eliminate water and below the pyrolytic point of the reactions and the reaction products. In general, the reaction is carried out at a temperature of from to 280 C., but preferably at to 200 C.

The product formed on acylation will vary with the particular conditions employed. First the salt, then the amide is formed. If, however, after forming the amide at a temperature between l40250 C., but usually not above 200 C., one heats such products at a higher range, approximately 250280 C., or higher, possibly up to 300 C. for a suitable period of time, for example, l-Z hours or longer, one can in many cases recover a second mole or water for each mole of carboxylic acid group employed, the first mole of water being evolved during amidification. The product formed in such cases contains a cyclic amidine ring, such as an imidazoline or a tetrahydropyrimidine ring. Infrared analysis is a convenient method of determining the presence of these groups.

Water is formed as a by-product of the reaction between the acylating agent and polyethyleneimine. In order to facilitate the removal of this water, to effect a. more complete reacion in accordance with the principle of LeChatelier, a hydrocarbon solvent which forms an azeotropic mixture with water can be added to the reaction mixture. Heating is continued with the liquid reaction mixture at the preferred reaction temperature, until the removel of water by azeotropic distillation has substantially ceased. In general, any hydrocarbon solvent which forms an azeotropic mixture with water can be used. It is preferred, however, to use an aromttic hydrocarbon solvent of the benzene series. Non-limiting examples of the preferred solvent are benzene, toluene, and xylene, The amount of solvent used is a variable and non-critical factor. It is dependent on the size of the reaction vessel and the reaction temperature selected. Accordingly, a sufiicient amount of solvent must be used to support the azeotropic distillation, but a large excess must be avoided since the reaction temperature will be lowered thereby. Water produced by the reaction can also be removed by operating under reduced pressure. When operating with a reaction vessel equipped with a refiux condenser provided with a water takeoff trap, sufficient reduced pressure can be achieved by applying a slight vacuum to the upper end of the condenser. The pressure inside the system is usually reduced to between about 50 and about 300 millimeters. If desired, the water can be removed also by distillation, while operating under relatively high temperature conditions.

The time of rtaction between the acylating agent and polyethyleneimine is dependent on the weight of the charge, the reaction temperature selected, and the means employed for removing the water from the reaction mixture. In practice, the reaction is continued until the formation of water has substantially ceased. In general, the time of reaction will vary between about 4 hours and about ten hours.

Although a wide variety of carboxylic acids produce excellent products, carboxylic acids having more than six carbon atoms and less than 40 carbon atoms but preferably 830 carbon atoms give most advantageous products. The most common examples include the detergent forming acids, i.e., those acids which combine with alkalies to produce soap or soap-like bodies. The detergent-forming acids, in turn, include naturally-occurring fatty acids, resin acids, such as abietic acid, naturallyoccurring petroleum acids, such as naphthenic acids, and carboxy' acids, produced by the oxidation of petroleum. As will be subsequently indicated, there are other acids which have somewhat similar characteristics and are derived from somewhat diiferent sources and are different in structure, but can be included in the broad generic term previously indicated.

Suitable acids include straight chain and branched chain, saturated and unsaturated, aliphatic, alicyclic, fatty, aromatic, hydroaromatic, and aralkyl acids, etc.

Examples of saturated aliphatic monocarboxylic acids are acetic, propionic, butyric, valeric, caproic, heptanoic, caprylic, nonanoic, capric, undecanoic, lauric, tridecanoic, myristic, pentadecanoic, palmitic, heptadecanoic, stearic, nonadecanoic, eicosanoic, heneicosanoic, docosanoic, tricosanoic, tetracosanoic, pentacosanoic, cerotic, heptacosanoic, montanic, nonacosanoic, melissic and the like.

Examples of ethylenic unsaturated aliphatic acids are acrylic, methacrylic, crotonic, anglic, teglic, the pentenoic acids, the hexenoic acids, for example, hydrosorbic acid, the heptenoic acids, the octenoic acids, the nonenoic acids, the decenoic acids, for example, obtusilic acid, the undecenoic acids, the dodencenoic acids, for example, lauroleic, linderic, etc., the tridecenoic acids, the tetradecenoic acids, for example, myristoleic acid, the pentadecenoic acids, the hexadecenoic acids, for example, palmitoleic acid, the heptadecenoic acids, the octodecenoic acids, for example, petrosilenic acid, oleic acid,

elardic acid, the nonadecenoic acids, for example, the eicosenoic acids, the docosenoic acids, for example, erucic acid, brassidic acid, cetoleic acid, the tetradosenic acids, and the like.

Examples of dienoic acids are the pentadienoic acids, the hexadienoic acids, for example, sorbic acid, the octadienoic acids, for example, linoleic, and the like.

Examples of the trienoic acids are the octadecatrienoic acids, for example, linolenic acid, eleostearic acid, pseudoeleostearic acid, and the like.

Carboxylic acids containing functional groups such as hydroxy groups can be employed. Hydroxy acids, particularly the alpha hydroxy acids include glycolic acid, lactic acid, the hydroxyvaleric acids, the hydroxy caproic acids, the hydroxy-heptanoic acids, the hydroxy caprylic acids, the hydroxynonanoic acids, the hydroxycapric acids, the hydroxydecanoic acids, the hydroxy lauric acids, the hydroxy tridecanoic acids, the hydroxy-myristic acids, the hydroxypentadecanoic acids, the hydroxy-palmitic acids, the hydroxyhexadecanoic acids, the hydroxyheptadecanoic acids, the hydroxy stearic acids, the hydroxyoctadecenoic acids, for example, ricinoleic acid, ricinelardic acid, hydroxyoctadecynoic acids, for example, ricinstearolic acid, the hydroxyeicosanoic acids, for example, hydroxyarachidic acid, the hydroxydocosanoic acids, for example, hydroxybehenic acid, and the like.

Examples of acetylated hydroxyacids are ricinoleyl lactic acid, acetyl ricinoleic acid, chloroace tyl ricinoleic acid, and the like.

Examples of the cyclic aliphatic carboxylic acids are those found in petroleum called naphthenic acids, hydrocarbic and chaumoogric acids, cyclopentane carboxylic acids, cyclohexanecarboxylic acid, campholic acid, fenchlolic acids, and the like.

Examples of aromatic monocarboxylic acids are benzoic acid, substituted benzoic acids, for example, the toluic acids, the xyleneic acids, alkoxy benzoic acid, phenyl benzoic acid, naphthalene carboxylic acid, and the like.

Mixed higher fatty acids derived from animal or vegetable sources, for example, lard, cocoanut oil, rapeseed oil, sesame oil, palm kernel oil, palm oil, olive oil, corn oil, cottonseed oil, sardine oil, tallow, soybean oil, peanut oil, castor oil, seal oils, whale oil, shark oil, and other fish oils, teaseed oil, partially or completely hydroginated animal and vegetable oils are advantageously employed. Fatty and similar acids include those derived from various waxes, such as beeswax, spermaceti, montan wax, Japan wax, coccerin and carnaubawax. Such acids include carnaubic acid, cerotic acid, lacceric acid, montanic acid, psyllastearic acid, etc. One may also employ higher molecular weight carboxylic acids derived by oxidation and other methods, such as from parafiiin Wax, petroleum and similar hydrocarbons; resinic and hydroaromatic acids, such as hexahydrobenzoic acid, hydrogenated naphthoic, hydrogenated carboxyl diphenyl, naphthenic, and abietic acid; Twitchell fatty acids, carboxydiphenyl pyridine carboxylic acid, blown oils, blown oil fatty acids and the like.

Other suitable acids include phenylstearic acid, benzoylnonylic acid, cetyloxybutyric acid, cetyloxyacetic acid, chlorstearic acid, etc.

Examples of the polycarboxylic acids are those of the aliphatic series, for example, oxalic, malonic, succinic, glutaric, adipic, pimelic, suberic, azelaic, sebacic, nonane dicarboxylic acid, decanedicarboxylic acids, undecanedicarboxylic acids, and the like.

Examples of unsaturated aliphatic polycarboxylic acids are fumaric, maleic, mesocenic, citraconic, glutonic, itaconic, muconic, aconitic acids, and the like.

Examples of aromatic polycarboxylic acids are phthalic, isophthalic acids, terephthalic acids, substituted derivatives thereof, (e.g. alkyl, chloro, alkoxy, etc. derivatives), biphenyldicarboxylic acid, diphenylether, dicarboxylic acids, diphenylsulfone dicarboxylic acids and the like.

Higher aromatic polycarboxylic acids containing more than two carboxylic groups are himimellitic, trimellitic, trimesic, mellophanic, prehnitic, pyromellitic acids, mellitic acid, and the like.

Other polycarboxylic acids are the dimeric, trimeric, and polymeric acids, for example, dilinoleic, trilinoleic, and other polyacids sold by Emery Industries, and the like. Other polycarboxylic acids include those containing ether groups, for example, diglycolic acid. Mixtures of the above acids can be advantageously employed.

In addition, acid precursors such as acid anhydrides, esters, acid halides, glycerides, etc., can be employed in place of the free acid.

Examples of acid anhydrides are the alkenyl succinic acid anhydrides.

Any alkenyl succinic acid anhydride or the corresponding acid is utilizable for the production of the reaction products of the present invention. The general structural formulae of these compounds are:

Acid

wherein R is an alkenyl radical. The alkenyl radical can be straight-chain or branched-chain; and it can be saturated at the point of unsaturation by the addition of a substance which adds to olefinic double bonds, such as hydrogen, sulfur, bromine, chlorine, or iodine. It is obvious, of course, that there must be at least two carbon atoms in the alkenyl radical, but there is no real upper limit to the number of carbon atoms therein. However, it is preferred to use an alkenyl succinic acid anhydride reactant having between about 8 and about 18 carbon atoms per alkenyl radical. Although their use is less desirable, the alkenyl succinic acids also react, in accordance with this invention, to produce satisfactory reaction products. It has been found, however, that their use necessitates the removal of water formed during the reaction and also often causes undesirable side reactions to occur to some extent. Nevertheless, the alkenyl succinic acid anhydrides and the alkenyl succinc acids are interchangeable for the purposes of the present invention. Accordingly, when the term alkenyl succinic acid anhydride, is used herein, it must be clearly understood that it embraces the alkenyl succinic acids as well as their anhydrides, and the derivatives thereof in which the olefinic double bond has been saturated as set forth hereinbefore. Non-limiting examples of the alkenylsuccinic acid anhydride reactant are ethenyl succinic acid anhydrides; ethenyl acid; ethyl succinic acid anhydride; propenyl succinic acid anhydride; sulfurized propenyl succinic acid anhydride; butenyl succinic acid; 2-methylbutenyl succinic acid anhydride; 1,2-dichloropenty1 succinic acid anhydride; hexenyl succinic acid anhydride; hexyl succinic acid; sulfurized 3-rnethylpentenyl succinic acid anhydride; 2,3-dimethy1- butenyl succinic acid anhydride; 3,3-dimethylbutenyl succinic acid; 1,Z-dibromo-Z-ethylbutyl succinic acid; heptenyl succinic acid anhydride; 1,2-diiodooctyl succinic acid; octenyl succinic acid anhydride; Z-methyl-heptenyl succinic acid anhydride; 4-ethylhexeneyl succinic acid; 2- isopropylpentenyl succinic acid anhydride; noneyl succinic acid anhydride; 2-propylhexenyl succinic acid anhydride; decenyl succinic acid; decenyl succinic acid anhydride; 5-

methyil-2-isopropylhexenyl succinic acid anhydride; 1,2 dibromo-Z-ethyloctenyl succinic acid anhydride; decyl succinic acid anhydride; undecenyl succinic acid anhydride; 1,2 dichloro undecyl succinic acid anhydride; 1,2-ditchloro-undecyl succinic acid; 3-ethyl-2-t-butylpentenyl succinic acid anhydride; dodecenyl succinic acid anhyidride; dodecenyl succinic acid; 2-propylnonenyl succinic acid anhydride; 3-butyloctenyl succinic acid anhydride; \tridecenyl succinic acid anhydride; tetradecenyl succinic acid anhydride; hexadecenyl succinic acid anhydride; sulifurized octadecenyl succinic acid; octadecyl succinic acid anhydride; 1,2-dibrom-2-methylpentadecenyl succinic acid anhydride; 8-propylpentadecyl succinic acid anhydride; eicosenyl succinic acid anhydride; 1,2-dichloro-2-methylnonadecenyl succinic acid anhydride; 2-octyldodecenyl succinic acid; 1,2-diiodotetracosenyl succinic acid anhydride; hexacosenyl succinic acid; hexacosenyl succinic acid anhydride; and hentriacontenyl succinic acid anhydride.

The methods of preparing the alkenyl succinic acid anhydrides are well known to those familiar with the art. The most feasible method is by the reaction of an olefin with maleic acid anhydride. Since relatively pure olefins are difficult to obtain, and when thus obtainable, are often too expensive for commercial use, alkenyl succinic acid anhydrides are usually prepared as mixtures by reacting mixtures of olefins with maleic acid anhydride. Such mixtures, as well as relatively pure anhydrides, are utilizable herein.

In summary, without any intent of limiting the scope of the invention, acylation includes amidification, the formation of the cylic amidine ring, the formation of acid imides such as might occur when anhydrides such as the alkenylsuccinic acids are reacted, i.e.

wherein P=the polyethyleneimine residue, polymers as might occur when a dicarboxylic acid is reacted intermolecularly with polyethyleneimine, cyclization as might occur when a dicarboxylic acid reacts intramolecularly with polyethyleneimine as contrasted to intermolecular reactions, etc. The reaction products may contain other substances. Accordingly, these reaction products are most accurately defined by a definition comprising a recitation of the process by which they are produced, i.e., by acylation.

The moles of acylating agent reacted with polyethyleneimine will depend on the number of acylation reactive positions contained therein as well as the number of moles of acylating agent one wishes to incorporate into the polymer. Theoretically one mole of acylating agent can be reacted per amino group on the polyethyleneimine molecule. We have advantageously reacted 1-20 moles of acylating agent per mole of polyethylene 900, but preferably 1-12 moles. Proportionately greater amounts of acylating agent can be employed with polyethyleneimine of higher molecular weight. Thus, with polyethyleneimine 20,000, 1-50 moles of acylating agent can be employed, and with polyethyleneimine 35,000, 1-100 moles can be employed, etc. Optimum acylation will depend on the particular use.

The following examples are illustrative of the preparation of the acylated polyethyleneimine.

The following general procedure is employed in acylating. A xylene suspension of polyethyleneimine, after the removal of water, is mixed with the desired ratio of acid. Heat is then applied. After the removal of the calculated amount of water (1 to 2 equivalents per carboxylic acid group of the acid employed), heating is stopped and the azeotroping agent is evaporated under vacuum. The temperature during the reaction can vary from to 200 C.

Where the formation of the cyclic amidine type structure is desired, the maximum temperature is generally 180- 250 C. and more than one mole of water per carboxylic group is removed. The reaction times range from 4 to 24 hours. Here again, the true test of the degree of reaction is the amount of water removed.

Example 1-A7 The reaction is carried out in a 5 liter, 3 necked flask furnished with a stirring device, thermometer, phase separating trap, condenser and heating mantle to 1 mole (900 grams) of polyethyleneimine 900 in an equal weight of xylene, (i.e., 90 grams), 200 grams of lauric acid (1 mole) is added with stirring in about ten minutes. The reaction mixture is then heated gradually to about 145 C. in half an hour and then held at about 160 C. over a period of 3 hours until 19 grams (1.1 mole) of Water is collected in the side of the tube. The solvent is then removed with gentle heating under reduced pressure of approximately 20 mm. The product is a dark, viscous, xylene-soluble liquid.

Example 1A TABLE I.ACYLATED PlgtfilgggTS OF POLYETHYLENE Molecular Ratio mols Ratio mols weight of of acid of water Ex. Acid polyethylper mol removed eneimine of PE per mol of acid 1-A1 Laurie (200) 900 10: 12

1 1 6:1 :1 4: 1 1: 1 1: 1 6: 1 5: 1 2 4:1 6 1: 1 0 0:1 3 5: 1 8 2: 1 1 1: 1 2 3: 1 6 2: 1 3 1: 1 O 3:1 4 5-14: d0 20, 000 2: 1 1 6A1. Dimeric (600) (Emery 20,000 3:1 5

Industries) 20, 000 2: 1 0 20, 000 1 z 1 1 20, 000 1 :2 0 50, 000 3:1 7 50, 000 2: 1 6 d0. 50,000 1:1 5 Myristic (228. 4). 50, 000 3: 1 1 842 d0 50, 000 2:1 0 8-A v.( 50, 000 1:1 3 9A1 Alkenyl (C12) Succinic 50, 000 6:1 5

Anhy. (266). 9-Az .110 50, 000 4:1 6 9-A3 -d0 5 ,000 2:1 4 10-11 Naphthenic (330) (Suu- 50, 000 2: 1 8

aptic Acid B). 10-A2 d0 50, 000 1:1 2 11A1 Maleic Anhydride (98) 50, 000 1 1 11-Az d0 5 000 0. 8:1 11-Aa d0 000 1:2

Oleig (282) 2:1 2 o 1AM 1 1 1. 0 1 :2 2. 0 2:1 1. 1 1:1 1. 1

The following table presents specific illustration of compounds other than polyethyleneimine and its derivatives.

TABLE I-A.ACYLATED PRODUCTS OF POLYPROPYL- ENEIMINE Molecular Mols of acid Mols of weight of per mol of water Ex. polypropyl- Acid polypropylremoved enelmine eneimine per mol of acid 15-A1 500 Stearic (284) 2:1 1. 9 15-111 500 do 1: 1 1. 1 15A3 500 1:1 0.9 16A 1,000 3:1 1.0 16A1 1 000 1:1 1. 2 16A 1,000 2:1 1.0 17A 5, 000 1:1 2. 0 17A 5,000 3:1 1. 3 17A3 5, 000 1: 1 1. 5

18-11 10, 000 4: 1 0. 9 18-A2 10,000 2:1 1. 0 18A l 10, 000 1: 1 1 0 19-Au 20,000 1 1 19Az 20,000 4: 1 3. 2 19-A 20, 000 2: 1 2. 1 20A 40, 000 2: 1 1. 7 QQ-Ag. 40, 000 3:1 2. 8 20-A 40, 000 Alkenyl (C12) Succinie 1:1

Anhydride (266).

OXYALKYLATION Polyethyleneimine can be oxyalkylated in the conventional manner, for example, by means of an alpha-beta alkylene oxide such as ethylene oxide, propylene oxide, butylene oxide, octylene oxide, a higher alkylene oxide, styrene oxide, glycide, methylglycide, etc., or combinations thereof. Depending on the particular application desired, one may combine a large proportion of alkylene oxide, particularly ethylene oxide, propylene oxide, a combination or alternate additions of propylene oxide and ethylene oxide, or smaller proportions thereof in relation to polyethyleneimine. Thus, the molar ratio of alkylene oxide to polyethyleneimine can range within wide limits, for example, from a 1:1 mole ratio to a ratio of 100021, or higher, but preferably 1 to 200. For example, in demulsification extremely high alkylene oxide ratios are often advantageously employed such as 200-300 or more moles of alkylene oxide per mole of polyethyleneimine. On the other hand, for certain applications such as corrosion prevention and use as fuel oil additives, lower ratios of alkylene oxides are advantageously employed, i.e., l-10-25 moles of alkylene oxide per mole of polyethyleneimine. With higher molecular weight polyethyleneimine, more oxyalkylatable reaction centers are present for alkylene oxide addition and very high ratios of alkylene oxide can be added. By proper control, desired hydrophilic or hydrophobic properties are imparted to the composition. As is well known, oxyalkylation reactions are conducted under a wide variety of conditions, at low or high pressures, at low or high temperatures, in the presence or absence of catalyst, solvent, etc. For instance oxyalkylation reactions can be carried out at temperatures of from -200 C., and pressures of from 10 to 200 p.s.i., and times of from 15 min. to several days. Preferably oxyalkylation reactions are carried out at 80 to C. and 10 to 30 p.s.i. For conditions of oxyalkylation reactions see US. Patent 2,792,369 and other patents mentioned therein.

Oxyalkylation is too well known to require a full discussion. For purpose of brevity reference is made to Parts One and Two of US. Patent No. 2,792,371, dated May 14, 1957, to Dickson in which particular attention is di rected to the various patents which describe typical oxyalkylation procedure. Furthermore, manufacturers of alkylene oxides furnish extensive information as to the use of oxides. For examples, see the technical bulletin entitled Ethylene Oxide which has been distributed by the Jefferson Chemical Company, Houston, Texas. Note also the extensive bibliography in this bulletin and the large number of patents which deal with oxyalkylation processes.

The symbol employed to designate oxyalkylation is 0.

Specifically 1-0 represents oxyalkylated polyethylenemine.

In the following oxyalkylations the reaction vessel employed is a stainless steel autoclave equipped with the usual devices for heating and heat control, a stirrer, inlet and outlet means and the like which are conventional in this type of apparatus. The stirrer is operated at a speed of 250 r.p.m. Polyethyleneimine dissolved and/or suspended in an equal weight of xylene is charged into the reactor. The autoclave is sealed, swept with nitrogen, stirring started immediately and heat applied. The temperature is allowed to rise to approximately 100 C. at which time the addition of the alkylene oxide is started and added continuously at such speed as it is absorbed by the reaction mixture. When the rate of oxyalkylation slows down appreciably, which generally occurs after about moles of ethylene oxide are added or after about 10 moles of propylene oxide are added, the reaction vessel is opened and an oxyalkylation catalyst is added (in 2 weight percent of the total reactants present). The catalyst employed in the examples is sodium methylate. Thereupon the autoclave is flushed out as before and oxyalkylation completed. In the case of oxybutylation, oxyoctylation, oxystyrenation, and other oxyalkylations, etc., the catalyst is added at the beginning of the operation.

Example 1-0 Using the oxyalkylation apparatus and procedure stated above, the following compounds are prepared: 900 grams (1 mol) of polyethyleneimine 900 in xylene are charged into a stainless steel autoclave, swept with nitrogen, stirring started, and autoclave sealed. The temperature is allowed to rise approximately 100 C. and ethylene oxide is injected continuously until 220 grams (5 mols) total had been added over a one-half hour period. This reaction is exothermic and requires cooling to avoid a rise in temperature after removal of xylene. The reaction mass is transferred to a suitable container. Upon cooling to room temperature, the reaction mass is a dark extremely viscous liquid.

Example 1O The same procedure as Example 1-0 is used except that 396 grams of ethylene oxide (9 mols) is added to 900 grams (1 mol) of polyethyleneimine 900. This reaction material is a dark viscous liquid at room temperature.

Example 1O The same procedure as Example 1-0 is used and 396 grams of ethylene oxide (9 mols) are added to 900 grams (1 mol) of polyethyleneimine 900. After this reaction is completed, the autoclave is opened and grams of sodium methylate are added. The autoclave is then flushed again with nitrogen and an additional 572 grams (13 mols) of ethylene oxide is added at 100 C. This reaction is highly exothermic. The reaction mass now contains 1 mol of polyethyleneimine 900 and a total of 22 mols of reacted ethylene oxide.

Example 1-0,

A portion of the reaction mass of Example 1O is transferred to another autoclave and an additional amount of EtO was added. The reaction mass now contains the ratio of 1 mol of polyethyleneimine 900 to 40 mols of EtO.

Example 1-O The addition of ethylene oxide to Example 1-0.; is continued until a molar ratio of 1 mol of polyethyleneimine 900 to 75 mols of EtO is reached.

Example 1-0 The addition of ethylene oxide to Example 1-O is continued until a molar ratio of 1 mol of polyethyleneimine 900 to 83 mols of EtO is reached.

1 2 Example 1-07 The addition of ethylene oxide to the Example 1-O is continued until a molar ratio of 1 mol of polyethyleneimine 900 to 105 mols of EtO is reached.

Example 16O 2,000 grams (0.1 mol) of polyethyleneimine of molecular weight of 20,000 in xylene are charged into a conventional stainless steel autoclave. The temperature is raised to 120 C., the autoclave is flushed with nitrogen and sealed, Then 11.6 grams of propylene oxide (0.2 mol) are added slowly at 120 C. A sample is taken at this point and labeled 16-0 This sample contains two mols of PrO for each mol of polyethyleneimine. It is a dark, pasty solid at room temperature.

Example 16-0 The addition of propylene oxide 16-0 is continued as follows: The autoclave is opened and 5 grams of sodium methylate are added. The autoclave is again purged with nitrogen and sealed. Propylene oxide is added carefully until an additional 23.2 grams have been reacted. A sample is taken at this point and labeled 16O This compound now contains 6 mols of propylene oxide for each mol of polyethyleneimine 20,000.

Example 16-0 The oxypropylation of 16-0 is continued until an additional 52.2 grams of propylene oxide are reacted. A sample is taken at this point and labeled 16-0 16-0 contains 15 mols of propylene oxide for each mol of polyethyleneimine 20,000. At room temperature the prodnet is a dark, pasty solid.

This oxyalkylation is continued to produce examples 16O 16O A summary of oxyalkylated products produced from polyethyleneimines is presented in the following Table II.

The Roman numerals, (I), (II), and (III) besides the moles of oxide added indicate the order of oxide addition (I) first, (II) second and (III) third, etc.

The following abbreviations are also used throughout this application:

EtO B110 PrO Physical properties (I 900 Glyeidol 4 mols Viscous liquid. 900 10(II) 10(I). 12(III) Dark, thick liquid 900 5(III) (11)..- 5(I) Do. 900 18(I) 12(III 10(II) D0. 900 20(I) (II)..- 5(III) D0. 900 Octylene oxide, 8 mols Viscous liquid. 8O. 900 Styrene oxide, 5 mols D0. 9-0...... 900 Epoxide 201 (Carbide and Solid.

Carbon) 1 mol 10-01.... 5,000 l Viscous li' uid. 0-O2 5,000 7 D0.

TABLE II.Con1tiuued EtO PrO BuO Physical properties Viscous liquid.

. Dark, thick liquid.

350).... (III).. 10(11)..- Solid. 10(11) (I).. (III).. Viscous hquid. 6(111)... 3(1). 2(11) Do. 10

The following table presents specific illustration of compounds other than polycthyleneimine and 1s derivativcs.

T ABLE IIA.OXYALKYLATED PRODUCTS OF POLYPRO- PYLENEIMINE M01 Mols oi alkyleue oxide per weight of mol of polypropyleneimine EX. polypro- Physical properties pylene- EtO PrO BuO imine 27-0 500 1 Viscous liquid. 27-02..... 500 Do. 27-03. 500 Solid. 27-04....- 500 D0. 27-05.- 500 D0. 270u.. 500 Do. 28-01..-. 500 Viscous Liquid. 28-02....- 500 D0. 28-0 500 Do. 28-04"..- 500 Do. 28-05-.- 500 D0. 28-00..." 500 Do. 28-0 500 Do. 29-01..." 500 D0. 29-02... 500 Do. 29-03.-. 500 Do. 29-0 500 Do. 29-05..." 500 Do. 30-01..... 500 Do. 30-02. 500 Paste. 310i....- 500 Solid. 31-02... 500 Thick dark liquid. 32-01-..- 500 Do. 32-02-.-- 500 32-O 500 15(I)..-. (11)... 1(III)... Do, 32-04..- 500 5( 0 Do. 33-0 500 Octylcne oxide, 5 mols Do. 34-0 500 Styrene oxide, 3 mols Do. 35-0...- 500 Epoxide 201 (Carbide and Solid.

Carbon) 1 mol 1, 000 1 Viscous liquid. 36-02".-- 1,000 3... 36-03... 000 36-04.... 1,000 36-05..... 1,000 36-05"... 1,000 36-01..... 1,000 37-01... 1, 000 37-02. 1, 000 37-03"..- 1, 000 37-04. 1, 000 37-0 1,000 38-01 1,000 38-02..... 1, 000 39-01..." 1,000

l, 000 6(1) 1,000 14(III).- 2(II) 8(1). Solid. 39-04.. 1, 000 10(11) 10(III) 10(1). Thick liquid. 40-0.... 1, 000 Epoxide 201 (Carbide and Solid.

. Carbon) 2 mols ell-0....-. 1, 000 Styrene oxide, 6 mols Viscous liquid. 42-0 1, 000 Octylene oxide 2 mols Do. 43-01"... 5,000 Do. 43-02..-" 5, 000 D0. 43-03..." 5, 000 Solid. 43-0 5,000 Do. 43-05..... 5, 000 D0. 43-05..- 5, 000 D0. 44-01.- 5, 000 Viscous liquid. 44-02. 5, 000 Thick liquid. 44-03..- 5,000 Do. 44-04..." 5,000 Do. 44-0 5, 000 D0. 44-00-.." 5, 000 Do. 44-01-.-- 5,000 200-. Do. 45-01. 5, 000 5(III) 40(11) 3( Viscous Liquid. 45-02..." 5, 000 I)--. 80(III).. 10(I) Do. 45-03..." 5, 000 40(II)... 4(III) Do. 45-04..... 5, 000

10..- 10(III) 14(I) 6(II) 22(111) 1(II) TABLE II-A.Continued M01 Mols of alkylene oxide per weight of mol of polypropyleneimine Ex. polypropylene- EtO PrO BuO imme Physical properties I)--- 40(II) 2 1)"--. 2001 60(1) 5(111 5(1)--- (11 ACYLATION THEN OXYALKYLATION Prior acylated polyethyleneimine can be oxyalkylated in the above manner by starting with acylated polyethyleneimine instead of the unreacted polymer. Non-limiting examples are presented in the following tables. The symbol employed to designate an acylated, oxyalkylated polyethyleneimine is A0. Specifically 1A O represents acylated, then oxyal'kylated polyethyleneimine.

Example 1-A O For this example an autoclave equipped to handle alkylene oxides is necessary. 1671 grams (1 mole) of 1-A are charged into the autoclave. Following a nitrogen purge and the addition of 75 grams of sodium methylate, the temperature is raised to 135 C. and 2436 grams of PrO (42 mols) are added. At the completion of this reaction, 440 grams of EtO (l0 mols) are added and the reaction allowed to go to completion. The resulting polymer is a dark viscous fluid soluble in an aromatic solvent. Ratio of reactants 1 mole starting material/Pro 42 mols/EtO 10 mols.

Example 2A O For this example a conventional autoclave equipped to handle alkylene oxides is necessary. 525 grams of 2-A (0.1 mol) are charged into the autoclave. The charge is catalyzed with 20 grams of sodium methylate, purged with nitrogen and heated to 150 C. 24.6 grams (0.2 mole) of styrene oxide are added and reacted f6? four hours with agitation. The resulting product is a dark extremely viscous fluid. Ratio of reactants 1 mole starting material/2 moles EtO.

These reactions and other reactions are summarized in the following table.

tives.

TABLE III-A.OXYALKYLATED, PRIOR ACYLATED POLYPROPYLENEIMINE EtO PrO BuO Example Physical properties Carbon),

8 Styrene oxide, 3 mols III) Eplehlorohydrin, 2 mols OXYALKYLATION THEN ACYLATION The prior oxyalkylated polyethyleneimine can be acylated with any of the acylation agents herein disclosed (in contrast to acylation prior to oxyalkylation). Since these reactants also have hydroxy groups, acylation, in addition to reaction with amino groups noted above, also includes esterification.

The method of acylation in this instance is similar to that carried out with polyethyleneimine itself, i.e., dehydration wherein the removal of water is a test of the completion of the reaction.

Example lO A One mole of 1-0 (1120 grams) in 500 ml. of xylene is mixed with three moles of acetic acid (180 grams) at room temperature. The temperature is raised slowly to -130" C. and refluxed gently for one hour. The temperature is then raised to 50-150 C. and heated until 3 moles of water and all of the xylene are stripped off. The dark product is water-soluble.

Example 2O A 0.1 mole of 2-0 (380 grams) in 400 ml. of xylene is mixed with 0.1 mole of palmitic acid (25.6 grams) at room temperature. Ratio 1 mole 2O to 1 mole of palmitic acid. Vacuum is applied and the temperature is raised slowly until one mole of water (18 grams) is removed. This product is a dark viscous liquid.

Example 2O A 0.1 mole of 2-0 (757 grams) is mixed with 500 grams of xylene and heated to 100 C. 0.1 mole of diglycolic acid (13.4 grams) is added slowly to prevent excessive foaming. Ratio 1 mole 2-O to 1 mole glycolic acid. The temperature is raised to -150 C. and held until one mole of water has evolved. This product is the diglycolic acid fractional ester of 2-0 A white precipitate forms during this reaction which can be removed by filtration. Analysis shows the precipitate to be sodium acid diglycollate, a reaction product of the catalyst and diglycolic acid. The filtered product is a dark viscous liquid at room temperature.

Table IV contains examples which further illustrate the invention. The symbol employed to designate oxyalkylated, acylated products is A.

TABLE IV.ACYLATED, PRIOR O YALKYLATED POLYETHYLENEIMINE Ratio mols Mols of of water Acylating acylating removed Physical Example agent agent per mol to mols properties oxyalkylated acylating PE agent employed 1O A Acetic 3 1 Dark viscous quid. l-OiAz Laurie 1 1 Do. 1-O A Acetic." 2 1 Solid. 2-03A leic.--. 3 1 Do. 2-O4A Palmitio 1 1 Do. 2-O5A Diglycol 1 1 Do. 4-O2A Stearie 2 1 Do. 6O A Maleie 1 Viscous liquid 2 1 Do. 1 1 Do. 2 1 Do. 1 1 Do. 1 1 D0. 1 2 Do. 2 1 Do. Ricinoleie- 1 1 Do. 20OaA- Maleic 1 Do.

anhydride. 22-O5A Linoleic 3 1 Do. 23-0211- Palmitic 1 1 Do. 24-O4A Acetic 1 1 Do. 25-OaAi Dimeric 1 1 Solid Emery Indus). 25-03112..- Diglycolic 1 1 Do. 26-0111-.." Dipuenolic. 1 1 Do. 26-0511-.- Terephtualic 1 1 Do. 26-O6A Benzoic 1 1 D0.

illustration of and its deriva- The following table presents specific compounds other than polyethyleneimine tives.

TAB LE IVA.--AOYLATED, PRIO R OXYALKYLATED POLYPROPYLENEIMINE Mols of Ratio mols acylating of water Acylating agent per removed to Physical Example agent mol of mols of properties oxyalkylated acylating polypropyagent leneirmne employed 27-0211"-.. Oleic 2 2 Thick dark liquid. 1 1 Pasty solid. 3 1 Do. 4 1 Do. 1 1 Do. 2 2 Do. 1 1 Do. 1 Do.

2 2 Do. 3 1 Waxy solid (Emery Industries.) 4 -0511- Diglycolic 1 1 Pasty solid 45O A Myristic 2 1 Do. 48-O A Rielnoleic 1 1 D0. 50O2A Abietic 2 2 Do. 51O 4A Linoleic 1 1 Do. 570aA Nonanoic- 1 1 Do. 590 A Laurie 1 1 Waxy solid. 62O2A Diglycolic 1 1 Do.

HEAT TREATMENT OF OXYALKYLATED PRODUCTS The oxyalkylated products described herein, for example, those shown in Table II relating to oxyalkylated polyethyleneimine and those in Table HI relating to oxyalkylated, prior acylated, polyethyleneimine can be heat treated to form useful compositions.

In general, the heat treatment is carried out at 200- 250 C. Under dehydrating conditions, where reduced pressure and a fast flow of nitrogen is used, lower temperatures can be employed, for example l50-200 C.

Water is removed during the reaction, such as by means of a side trap. Nitrogen passing through the reaction mixture and/or reduced pressure can be used to facilitate water removal.

The exact compositions cannot be depicted by the usual chemical formulas for the reason that the structures are subject to a wide variation.

The heat treatment is believed to result in the polymerization of these compounds and is effected by heating same at elevated temperatures, generally in the neighborhood of 200-270 C., preferably in the presence of catalysts, such as sodium hydroxide, potassium hydroxide, sodium ethylate, sodium glycerate, or catalysts of the kind commonly employed in the manufacture of superglycerinated fats, calcium chloride, iron and the like. The proportion of catalyst employed may vary from slightly less than 0.1%, in some instances, to over 1% in other instances.

Conditions must be such as to permit the removal of water formed during the process. At times the process can be conducted most readily by permitting part of the volatile constituents to distill, and subsequently subjecting the vapors to condensation. The condensed volatile distillate usually contains water formed by reaction. The water can be separated from such condensed distillate by any suitable means, for instance, distilling with xylene, so as to carry over the water, and subsequently removing the xylene. The dried condensate is then returned to the reaction chamber for further use. In some instances, condensation can best be conducted in the presence of a high-boiling solvent, which is permitted to distill in such a manner as to remove the water of reaction.

' In any event, the speed of reaction and the character of the polymerized product depend not only upon the original reactants themselves, but also on the nature and amount of catalyst employed, on the temperature employed, the time of reaction, and the speed of water removal, i.e., the elfectiveness with which the water of reaction is removed from the combining mass. Polymerization can be elfected without the use of catalysts in some instances, but such procedure is generally undesirable, due to the fact that the reaction takes a prolonged period of time, and usually a significantly higher temperature. The use of catalyst such as iron, etc, fosters the reaction.

The following examples are presented to illustrate heat treatment. The symbol used to designate a heat treated oxyalkylated polyethyleneimine is OH and an acylated, oxyalkylated product is AOH. In all examples 500 grams of starting material are employed.

EXAMPLE 2O H A conventional glass resin vessel equipped with a stirrer and Water trap is used. Five hundred grams of 2-0 are charged into the above resin vessel along with five grams of CaCl The temperature is raised to '22'5-250 C. and heated until 57 grams of water (3.2 moles) are evolved. This process takes 7.5 hours of heating. The product is an extremely viscous material at room temperature. However, upon warming slightly this product dissolves easily in water.

EXAMPLE 19-O H The process of the immediately previous example is repeated using 19-0 but substituting sodium methylate for calcium chloride. The product is a dark, viscous, Water-soluble material.

EXAMPLE 15O H The process of Example 2O H is repeated using 51-0 but substituting powdered iron for calcium chloride.

TABLE V.HEAT TREATED (1) OXYALKYLATED AND (2) ACYLATED, OXYALKYLATED POLYETHYLENEIMINE Reaction Water Removed Time Example Temp., 0. Catalyst (5 grams) in Hours Physical Properties Grams Mols 250 74 4. 1 8. Dark, viscous liquid. 225 57 3. 2 16. D0. 265 36 2. 0 23 D0. 270 38 2. 1 30 Do. 255 95 5. 3 9. 5 Solid. 240 32 1.8 12 Viscous liquid. 260 40 2. 2 13 Do. 250 72 4 18 D0. 200 54 3 24 Do. 265 90 5 30 Do. 255 54 3 16 Do. 235 36 2 18 D0. 275 76 4. 2 20 Solid. 255 54 3 16 Viscous liquid. 265 63 3. 5 8 Do. 255 57 3. 2 12 Do. 250 36 2 14 Do. 260 38 2. 1 11 Do. 265 40 2. 2 13 D0. 225 36 2. 0 16 Paste. 240 40 2. 2 8 Do. 235 90 5 14 D0.

12-A2O2H... 260 32 1. 8 18 D0.

The following table presents specific illustration of compounds other than polyethyleneimine and its derivatives.

The alkyl halides can be chemically pure compounds or of commercial purity. Mixtures of alkyl halides, having carbon chain lengths falling within the range specified TABLE VA.-HEAT TREATED (1)POXYALKYLATED AND (2) ACYLAIED, OXYALKYLATED OLYPROPYLENEIMINE Reaction Catalyst Water Removed Time in Example Tcmpcra- (5 grams) Hours Physical Properties ture, Grams Mols 260 32 1. 8 18 Dark, viscous liquid.

200 54 3. 0 24 Pasty.

260 40 2. 2 13 Viscous Liquid.

270 74 4. l 8. 0 Do.

235 36 2. 0 16 Do. 58-OzH 240 38 2. 1 11 Do. -A2O1H-. 255 57 3. 2 l2 Paste.

1 7-H 02H 245 54 3. O 16 Do. 19-A O;H 270 36 2. 0 18 Do. 20-A 0 H 265 90 5.0 Do. 20A1OaH 255 32 1. 8 12 Do.

ALKYLATION Alkylation relates to the reaction of polyethyleneimine and derivatives thereof with alkylating agents.

Any hydrocarbon halide, e.g. alkyl, alkenyl, cycloalkenyl, .aralkyl, etc., halide which contains at least one carbon atom and up to about thirty carbon atoms or more per molecule can be employed to alkylate the products of this invention. It is especially preferred to use alkyl halides having between about one to about eighteen carbon atoms per molecule. The halogen portion of the alkyl halide reactant molecule can be any halogen atom, i.e., chlorine, bromine, fluorine, and iodine. In practice, the alkyl bromides and chlorides are used, due to their greater commercial availability. Non-limiting exam-pies of the alkyl halide reactant are methyl chloride; ethyl chloride; propyl chloride; n-butyl chloride; sec-butyl iodide; t-butyl fluoride; n-amyl bromide, isoamyl chloride; n-hexyl bromide; n-hexyl iodide; heptyl fluoride; 2-ethyl-hexyl chloride; n-octyl bromide; decyl iodide; dodecyl bromide; 7-ethyl-2-methyl-undecyl iodide; tetradecyl bromide; hexadecyl bromide; hexadecyl fluoride; heptadecyl chloride; octadecyl bromide; docosyl chloride; tetracosyl iodide; hexacosyl bromide; octacosyl chloride; and triacontyl chloride. In addition, alkenyl halides can also be employed, for example, the alkenyl halides corresponding to the above examples. In addition, the halide may contain other elements besides carbon and hydrogen as, for example, where dichloroethylether is employed.

hereinbefore, can also be used. Examples of such mixtures are mono-chlorinated wax and mono-chlorinated kerosene. Complete instructions for the preparation of monochlorowax have been set forth in United States Patent 2,23 8,790.

Since the reaction between the alkyl halide reactant and polyethyleneimine is a condensation reaction, or an alkylation reaction, characterized by the elimination of hydrogen halide, the general conditions for such reactions are applicable herein. For certain uses it is preferable to carry out the reaction at temperatures of between about and about 250 C., preferably between about C. and about 200 C., in the presence of a basic material which is capable of reacting with the hydrogen halide to remove it. Such basic materials are, for example, sodium bicarbonate, sodium carbonate, pyridine, tertiary alkyl amines, alkali or alkaline earth metal hydroxides, and the like.

It is preferred to perform the reaction between the alkyl halide reactant and polyethyleneimine in a hydrocarbon solvent under reflux conditions. The aromatic hydrocanbon solvents of the benzene series are especially preferable. Non-limiting examples of the preferred solvent are benzene, toluene, and xylene. The amount of solvent used is a variable and non-critical factor. It is dependent on the size of the reaction vessel and on the reaction temperature selected. For example, it will be apparent that the amount of solvent used can be so great that the reaction temperature is lowered thereby.

The time of reaction between the alkyl halide reactant and polyethyleneimine is dependent on the weight of the charge, the reaction temperature selected, and the means employed for removing the hydrogen halide from the reaction mixture. In practice, the reaction is continued until no more hydrogen halide is formed. In general, the time of reaction will vary widely, such as between about four and about ten hours.

It can be postulated that the reaction between the alkyl halide reactant and polyethyleneimine results in the formation of products where the alkyl group of the alkylhalide has replaced a hydrogen atom attached to 2. nitrogen atom. It is also conceivable that alkylation of an alkylene group of polyethyleneimine can occur. However, the exact composition of any given reaction product cannot be predicted. For example, when two moles of butyl bromide are reacted with one mole of polyethyleneimine 900, a mixture of mono-, diand tri and higher N-alkylated products can be produced. Likewise, the alkyl groups can be substituted on different nitrogen atoms in dilferent molecules of polyethyleneimine.

Thus, the term Alkylation as employed herein and in the claims include alkenylation, cycloalkenylation, aralkylation, etc., and other hydrocarbonylation as well as alkylation itself.

In general, the following examples are prepared by reacting the alkyl halide with the polyethyleneimine at the desired ratio in the presence of one equivalent of base for each equivalent HCl given oif during the reaction. Water formed during the reaction is removed by distillation. Where the presence of the anions, such as chlorine, bromine, etc., is not material and salts and quaternary compounds are desired, no base is added.

The following examples are presented to illustrate alkylation of polyethyleneimine.

In these examples, the term mesomer is employed. A mesomer is defined as a repeating radical which, when combined with other mesomers, forms the principal portion of the polymer molecule.

Thus, the unit I I H CON- is the mesomer of polyethyleneimine, since polyethyleneimine may be represented by the formula H NHr-(CHz-CHzN) ..rr

Example K 430 grams of polyethyleneimine 50,000, equivalent to mesomeric units of ethyleneimine, in 500 ml. of vylene and 570 grams of sodium carbonate, equivalent to 8 moles, are placed in a reaction vessel equipped with a mechanical stirrer, a thermometer and a reflux condenser take-off for removal of volatile components. The stirred reactants are heated to about 100 C. whereupon 1140 g. (8 mols)-of dichloroethyl ether is started in slowly at such a rate that the temperature of the reaction vessel contents never exceeds 165 C., but preferably stays around 135 C. The reaction is exothermic and 5-6 hours are required to add all the dichloroethyl ether. After all the dichloroethyl ether has been added, the temperature is allowed to drop to about 90-100 whereupon reduced pressure is applied to the reaction vessel and all xylene stripped out. The material left in the vessel is a thick brown liquid which solidifies upon cooling to a glassysolid.

Example 8-A The equivalents of 8 mesomeric units, based on polyethyleneimine, of the material 8A (Table 1) in 300 g. xylene is placed in a reaction vessel described in the above example for 5K 340 grams anhydrous sodium carbonate, equivalent to 32 moles are added followed by 1.6 moles dimethyl sulfate. The temperature is then brought 22 up to 125 C. and held there for a period of 6-8 hours. Xylene is then removed under reduced temperature and pressure conditions as in the example for 5K The resulting product, a dark amber material, is very viscous at ordinary temperature.

Example 20-O HK The equivalent of 10 mesomeric units based on polyethyleneimine of the material 20O H (Table V) in 300 ml. of xylene and 420 grams sodium bicarbonate, equivalent to 5 moles, are placed in an autoclave equipped with a stirring device, a thermometer and a condenser reflux device which can be closed off from the autoclave during reactions in which pressures above atmosphere are experienced. The autoclave is closed and heat is applied to bring up the temperature to l20130 C. at which time 5 mols methyl chloride are added slowly while never allowing pressure to exceed 5 atmospheres pressure. Several hours will be necessary to get all methyl chloride in and pressure inside the vessel down to one atmosphere. At this point the reflux condenser is opened, the temperature is allowed to drop to -100 C. and a slight vacuum applied in order to reflux the xylene out of the autoclave. The resulting material is a very viscous amber colored liquid.

The reactions shown in the following table are carried out in a similar manner. Each reaction in the table is carried out in two ways-(1) in the presence of base, as in 5-K to yield the alkylation product and (2) in the absence of base to yield the halogen-containing or sulfate-containing (5K X) products.

The alkylated products of this invention contain primary, secondary, tertiary, and quaternary amino groups. By controlling the amount of alkylation agent employed and the conditions of the reaction, etc., one can control the type and amount of alkylation. For example, by reaction less than the stoichiometric amount of alkylation agent one could preserve the presence of nitrogen-bonded hydrogen present on the molecule and by exhaustive alkylation in the presence of sufiicient basic material, one can form more highly alkylated compounds.

The moles of alkylating agent reacted with polyethyleneimine will depend on the number of alkylation reactive positions contained therein as well as the number of moles of alkylating agent one wishes to incorporate into the molecule. Theoretically, every hydrogen bonded to a nitrogen atom can be alkylated. We have advantageously reacted 1-20 moles of alkylating agent per moles of polyethyleneimine 900 but preferably 1-12 moles. With polyethyleneimine 20,000 greater amounts of alkylating agent can be employed, for example 1-50 moles, and with polyethyleneimine 40,000, 1-100 moles, etc. Optimum alkylation will depend on the particular application.

In addition, the alkyl halide may contain functional groups. For example, chloroacetic acid can be reacted with polyethyleneimine to yield a compound containing carboxylic acid groups.

PN-CH COOH, wherein P is the residue of polyethyleneimine.

In addition, polyethyleneimine can be alkylated with an alkyl halide such as alkyl chloride and then reacted with chloroacetic acid to yield an alkylated polyethyleneimine containing carboxylic acid groups The symbol employed to designate an alkylated polyethyleneimine is K. Where the product is a salt or a quaternary the symbol is KX. Thus, for example, where no acceptor base is employed and a salt is allowed to form 1A O K would be 1A O KX.

TABLE VI.ALKYLATED PRODUCTS TABLE VI'A.Continucd Mols Molecular Mols of Moi. wt. alkylating Physical weight of aikylating Physical Ex. PE Alkylatiug agent agent per properties Example polypropyl- Alkylating agent agent per properties mesomer eneimine mesomer unit unit 0. Viscous 1, 000 Ethylene di- 0. 2 Do.

liquid. chloride. 0.7 Do. 0.5 Do. 900 0.3 Do. 0.2 Do. 900 0.8 Solid. 0. 5 Do. 5, 000 0. 3 Viscous 0. 2 Do. liquid 0.4 Do. 5, 000 1. olid. 0. 2 Solid. 5, 000 0. 2 Viscous liquid 0.5 Do. 0.5 Do. 0.3 Do. 0.2 Do. 0.6 Do. 0.5 Do. 02 D0. 0.2 Do. 11, 500 0. 4 Do. 0. 8 Do. 20,000 0. 2 Solid 0. 3 D0. 0.8 Do. 4-K2. 20, 000 0. 5 Do. 0. 3 Do. 4-K: 20, 000 O. 3 Viscous 0. 8 Do. liquid 0. 5 Do. 4-K4- 20, 000 0. 6 Do. 0. 8 Viscous 5K1. 0. 2 Do. liquid. 5-K2. 0. 8 Solid. Methyl chloride. 0. 3 Do. 5Ka 0.8 Viscous Ethylene di- 0. D0.

liquid chloride. 5-K4. 0.8 id. Dichlorodiethyl 0.2 Solid. 6-K1. 0.2 Viscous et er.

liquid Benzyl chloride.-. 0. 6 Do. G-Kz. 0. 8 Do. li-dichlorobutene- 0. 3 Do. (i-K3. 0.3 D0. 6-K4. 1.0 Solid. Dodecenyl 0.5 Viscous 1A K. 0. 2 Viscous chloride. liquid.

liquid. Benzyl chloride. 0. 2 Do. 2-A K. 0. 2 Do. 1,4 xylylene 1. 0 0. 311 K. 0. 2 Solid. dichloride. 4-A2K. 0.5 Viscous Dodecyl benzene 0.8 Do.

ubld ii chloride. 6-A4K. 0. 4 Solid. Dimethyl sulfate-. 0. 3 Solid. 8A1K... 0. 2 Viscous Ethylene di- 0. 7 Do.

liquid. chloride. 12-AzK Dichlorodicthyl ether 0. 4 Do. Butyl chloride. 0. 2 Do. 1-O2K. 1,4-dichlorobutcne-2 0.3 Do. Allyl chloride-- 0. 5 Do. 2-O K. Benzyl chloride 0. 4 Solid. (SI-02K. Bcnzyl chloride-.- 0.3 Viscous 3-O2K. Methyl chloride.. 0.7 Do. 30 iquid 4-0 11... Ethylene dichlori 0.2 Viscous 15-A204K Methyl chloride... 1.0 Solid.

liqu' 19-A;O K Ethylene di- 0. 6 Do. 6-OzK... Benzyl chloride.. 0. 4 Solid. chloride. 11-0 1! Dimethyl sulfate. 0.2 Viscous 19-A 03K Dichloro pentane. 0 5 Do. liquid. 27-0zAK. Dichlorodiethyl 0.2 Do. 14O K Dichlorodiethyl ether- 0. 4 Solid. other. iii-04K Methyl chloride 0. 6 Do Dimethyl suliate.- 1. 0 Do. 19-0 11" Dodeeyl benzyl chlo- 0. 2 Solid. Methyl chloride 0. 8 Do. ride. Allyl chloride-.. 0.5 Do. 19O K.. 1,4 xylylene dichlo- 0. 2 Viscous Butyl chloride-... 0. 2 Do.

ride. liquid 20-0 1! Benzyl chloride 0. 5 Solid. 22O.',K Methyl chloride. 0. 6 Do. 23-0 4K Dodecenyl chlori 0. 2 Do. 2-O4K-. Ethylene dichloride... 0.3 Viscous liquid 1-A5O1K. 0.2 Do. In addition to the above examples wherein a base acjiggigg-i ggceptor 1s employed to remove the acid anion such as halo- 12-AOK.. Methyl chloride. 0.5 Do. gen, sulfate, etc., the above examples are also prepared 853?"- ggfggi g gi g 8': B8- omittlng the morganlc base from the reaction medium. 14-06AK Dichlorodiethyl ether. 0.3 vilscousd When this 1s done, a halogen containing salt, quaternary,

iqul 224k; Methyl chloride M etc. is formed. Examples where such salts are formed will 26O5AK-- Benzylchloride.. 0.6 saga. be designated as above except that they will contain an 1-02HK... Benzyl chloride 0.4 o. tr MHK Dichlomdiethyletheh M viscous X deslgnatwn for a p Instead Of 1 1 1 y liquid 5r Will be 1O A KX, and mstead of 22O AK they will be 11-O1HK Ethylene dichloride... 0.2 Do. 0 t n 204mm Methyl ch10 ri den Q5 22 O AKX, etc X 1nd1cates salt formation. 25-OZHK Dimethyl sulfate 0. 2 Do.

The following table presents specific illustration of compounds other than polyethyleneimine and its derivatives.

TABLE VIA.ACYLATED PRODUCTS Molecular Mols of weight of alkylating Physical Example polypropyl- Alkylating agent agent per properties eneimine mesoriier 500 Allyl chloride. 0. 2 Viscous liquid. 500 .do .7 Do. 500 Benyzl chloride. 0.3 Do. 500 ...do 0.8 Do. I 000 Methyl chloride. 0. 7 Do. 1,000 ..do 1.0 Do.

ALKYLATED THEN ACYLATION The alkylated material prepared above can be further treated with acylating agent where residual acylatable amino groups are still present on the molecule. The acylation procedure is essentially that described above wherein carboxylic acids react with the alkylated polyethyleneimine under dehydrating conditions to form amides and cyclic amidines. The product depends on the ratio of moles of Water removed for each carboxylic acid group, i.e., 1 mole water/1 mole carboxylic essentially amides; more than 1 mole water/1 mole carboxylic acid group, essentially cyclic amidines, such as imidazolines.

Such compounds are illustrated in the following table. The symbol employed to designate alkylated, acylated products is KA and acylated, alkylated, acylated prod- EAKA.

TABLE VII.ACYLATED, PRIOR ALKYLATED POLY- ETHYLENEIMINE OR DERIVATIVE Where the compound contains an additional active hydrogen, other unsaturated molecules can be added to the Ratio mols Mols of original molecule for example:

acylating water Physical Example Acylating agent agent per removed per properties mol PE mole of l deriv. reactant PN=(CH2 CH2 O R) 1-K2A Laurie 4:1 1 Viscous K A 01 H 1 5 gq d Where one or more actlve hydrogens are present at angj j z'" 51335 g 8: other reactive site, the following reaction could take place: 4-K4A--- Dimerie..- 0. 5:1 1 Solid. 5-K1A Nonanoic 2:1 1 Viscous 10 O 0 K A R 1 2 1 s ib H 5- 2 ieino eic :1 o. ROC CH H N ()H OH R 5-K3A succlilnig d 2:1 1 Do. 0 PNP 2- o )h an y n e The reaction is carried out in the conventional manner Q is such as illustrated, for example, in Synthetic Organic liquid 15 Chemistry Wagner & Zook (Wiley 1953) page 673.

A 1 3 Non-limiting examples of unsaturated compounds which 0,KA Lau 5 i vi c can be reacted with the polyamine and derivatives thereof O K A 01m 2 1 1 3 5% 1nclud1ng the following acrylonltnle, acrylic and 1-0ZHKKI. Mamie": 1 1 Solid: rnethacrylicacids and esters crOtOnic acids and esters,

a yd d cinnamic ac1d and esters, styrene, styrene derivatives and The following table presents Specific inustratibns f related compounds, butadiene, vmyl ethers, vmyl ketones, compounds other than polyethyleneimine and its deriva- 11131610 51 18, vmyl sulfones etc, fives In addition, polyethylenelmlne and derivatives thereof TABLE VH A ACYLATED, PRIOR ALKYLATED' POLY. contarnmg act1ve hydrogens can be used to prepare PROPYLENEIMINE OR DERIVATIVE telomers of polymer prepared from vinyl monomers.

Ratiolngols of Mols of The following are examples of olefination. The symbol acy a mg we 81 reu a Example Acylating agent per mol moved per Physical employ ed 2 deilgnate olefinatlon 15 U and alkylauon agent of polypropymol of properties olefinatlon KU lieneiaimtine reactant 1 7-KzA Myristlm--- 2=1 1 vilscoug EXAMPLE 1 U1 101111 8K:A A tie 1 3 The olefination reaction is carried out in the usual gffk: 5 1 8: glass resin apparatus. Since the reaction is that of a double 11KA-, gl it 23- bond with an active hydrogen, no water is eliminated. 3 ,3 q The reaction is relatively simple, as shown by the follow- 16-A3KA lauric 4:1 1 vilscoug ing example;

1:1 L 5 55 Charge 900 grams of polyethyleneimine 900 in xylene o 38- (1 mol) into glass res1n apparatus. Care should be taken nonanoienn 5 1 that the lEI 900 is water-free, to eliminate undesirable 15A20iKA- rioliimileloun -8 s 23 slde react1ons. At room temperature, slowly add 53 grams g jggi 1 of acrylonitrile (1 mol). The reaction proceeds smoothly 85 33 without the aid of a catalyst. Warm gently to 80-100 C. 440mm".-- stearic" :1 1 Vilseoufl and lr f r one hour.

iqur 46O;HKA myristic 2:1 1 Do. EXAMPLE 6-U 20-AiOzHKA acetic 1:1 1 Do.

To 1,000 grams of polyethylene1m1ne 100,000 (001 OLEFINAT ION mol) in 300 grams of xylene, add 1.24 grams of divinyl Olefination relates to the reaction of polyethyleneimine 2252 9' at ai ig T f i g g and derivatives with olefins. 6 mm an 6 am [en pe u C 1s 6 p y The compositions of this invention, includlng poly- EXAMPLE 2 01KAU ethyleneimine itself as well as reaction products thereof E 1 h 1 f containing active hydrogens, can be reacted with unsatutg i K F g? pt; at 1 m0 0 rated compounds, particular compounds containing actig fiery g f 1S 1: lh q l g g 12 81 vated double bonds, so as to add polyethyleneimine across 1S i l t 6 Po f fi g z' 2 the double bonds as illustrated herein: pro uc 1st ereupon saponl e wlt so 111m y roxl e o O form the fatty amino ac1d salt.

n Further examples of the reaction are summarized in PNH CH1=CH OR PNCH7CH10OR the following l TABLE VIII.-OLEFINATION Moi weight Mols of Temp., Example of polyeth- Olefin olefin per Time C.

yleneimine m PE 900 Aerylonitrile 1:1 900 Methylacrylate 2 l 900 Styrene 3:1 5, 000 Ethyl einnamate- 2:1 5, 000 Ethyl crotonate. 2:1 5, 000 Dioctyl maleate 2:1 11, 500 Divinyl sulione 1:1 11, 500 1:1 11, 500 Lauryl methacryla 2:1 20, 000 Dlvinyl sulfone--- 1:1 20, 000 Methyl methaerylate 1 :1 20,000 Aorylonitrile 3:1 50, 000 Methylacrylate 3:1 50, 000 Aerylonitrile 3:1 50, 000 Styrene 3:1 100, 000 Divinyl sult'one- 1: l 100, 000 Ethyl crotonate 2:1 100, 000 Dioctyl maleate 2:1

TABLE VIII Continued Mols of Temp., Example Olefin olefin per Time 0.

mol PE l-AOU Styrene 1:1 2-A U Divlnyl sullone 1 1 Methylacrylate 1:1 Divinyl sulton 1:1 Styrene 3:1 2 hours 90 Dimethyl maleatm 1:1 1 hour. 100 Dioctyl maleate 2:1 1 hour. 100 Ethyl crotonate i 2:1 2 hours 125 D1vinylsulfon0 1:1 1 hour 70 tyrene 4:1 1 hour Aerylonitnlo 3:1 1 hour 80-100 Mothylacrylate.-.. 3:1 1 hour 80-100 Acrylonitrile 3:1 min 80-100 Methyl methacrylate 1:1 1 hour... 80-100 Divinyl sullone 1:1 1 hour 70 Lauryl methacrylate 2:1 3 hours 135 Divinyl sulton0 1:1 1 hour 70 Dioctyl maleate. 2:1 2 hours 100 Ethyl crotonate 2:1 3 hours 125 Ethyl clnnamate 2:1 3 hours 120 Styrene 3:1 2 hours 90 2-O KAU Methylacrylate 2:1 1 hour-.- 80-100 1-O2HKAU Acrylonitrilo 1:1 1 hour 80-100 cluding substituted derivatives such as those containing aryloxy, halogen, heterocyclic, amino, nitro, cyano, car- The following table presents specific illustration of compounds other than polyethyleneimine and its derivatives.

TABLE VIIIA.-OLEFINATION OF POLYPROPYLENEIMINE Mols of Molecular Olefin weight of per mol Example polypropyl- Olefin of poly- Time in Temp,

eneimlne propylenehours 0.

500 Styrene 1:1 1 90 500 Divinyl sulione.. 1:1 1 70 500 Acrylonitrile 2: 1 1 80-100 1, 000 Dioetyl maleate. 1:1 2 120 1, 000 Methylacrylate 1: 1 1 110 1, 000 Ethyl ciunamate 3:1 2 125 5,000 Lauryl methaerylate" 1: 1 3 130 5, 000 Ethyl crotonate 1:1 3 120 5, 000 Acrylonitrile. 4:1 1 80-100 10, 000 Styrene 2: 1 1 90 10, 000 Divinyl sullone 1:1 1 8O 10, 000 Methylacrylate 2: 1 1 100 20, 000 Lauryl methacrylate. 1:1 3 110 20, 000 2-.1 1 90 20,000 1:1 1 80 40,000 211 2 120 40,000 3:1 1 so 40, 000 Dioctyl maleate. 1: 1 4 110 CARBON YLA TION 4 boxyl, etc. groups thereof. Non-limiting examples are the Carbonylation relates to the reaction of polyethylene- 0 followmg: Ald h d imine and derivatives thereof with aldehydes and ketones. e y es Benzaldehyde Where primary 31'111110 groups are present on the poly- 2 eth lb m h d ethyleneimine reactants, Schiffs bases can be formed on 3 reaction with carbonyl compounds. For example, where 4 z g i z an aldehyde such as salicylaldehyde is reacted with polyi d ethyleneimine 900 in a ratio of 2 moles of aldehyde to 1 g: g:: mole of PE 900, the following type of compound could y e e y e b a-naphthaldehyde e formed.

b-naphthaldehyde 4-phenylbenzaldehyde C=N 0112011210 1nCHzCHzN=C Propionaldehyde l l n-Butyraldehyde HO OH Heptaldehyde Aldol 2-hydroxybenzaldehyde 2-hydroxy-6-methylbenzaldehyde Lesser molar ratios of aldehyde to polyamine would 2-hydroxy-3-methoxybenzaldehyde yield mono- Schiffs base such as 2-4-dihydroxybenzaldehyde H H 2-6-dihydroxybenzaldehyde C=N(CH2CH2N)mOII2CHzNHz,etc. 2-hydroxynaphthaldehyde-1 1-hydroxynaphthaldehyde-2 Anthrol-Z-aldehyde-l 2-hydroxyfiuorene-aldehyde-1 4-hydroxydiphenyl-aldehyde-3 3-hydroxyphenanthrene-aldehyde-4 and other isomeric configurations, such as where the 1-3-dihydroxy-2-4-dialdehydebenzene Schiffs base is present on the non-terminal amino group 2-hydroxy-S-chlorobenzaldehyde rather than on the terminal amino group, etc. 2-hydroxy-3:S-dibromobenzaldehyde A wide variety of aldehyde may be employed such as 2-hydroxy-3-nitrobenzaldehyde aliphatic, aromatic, cycloaliphatic, heterocyclic, etc., in- 2-hydroxy-3-cyanobenzaldehyde 29 Z-hydroxy-S-carboxybenzaldehyde 4-hydroxypyridine-aldehyde-S 4-hyd-roxyquinoline-aldehyde-3 7-hydroxyquinoline-aldehyde-8 30 bonyl compounds with polyethyleneimines. The symbol employed to designate carbonylation is C, acylation, carbonylation AC, and alkylation, canbonylation KC.

formaldehyde glyoxal Example 1-C glyceraldehyde Charge 900 grams of polyethyleneimine 900 and 900 1 base s P P f the polyethylenelmmes grams of Xylene into a conventional glass resin apparatus of thls {IlVil'ltlOn 1n a conventional manner such as de- 10 fitted with a stirrer, thermometer and side-arm trap. Raise scribed 1I1 syflflletlc Orgamc chemlstl'y y Wagner & temperature to 90 C. and slowly add 44 grams of acetal- Z0014 (1953 i) PP- dehyde (1 mol). Hold at this temperature for three hours. Whetre more extreme condmons employed, the Vacuum is then applied until all Xylene is stripped off. The P E y be f pp WheTem carbonyl reaction mass is a thick dark liquid which is soluble in act ant instead of reacting mtramolecularly 1n the case of water a Schiffs base may react intermolecularly so as to act as a bridging means between two or more polyethyleneimine compounds, thus increasing the molecular weight of the Examp 1 polyethyleneimine as schematically shown below in the 2 case where formaldehyde 1s the carbonyl compound: 0 Using same apparatus as above, charge 500 (0.1) of polyethyleneimine 5,000. While stirring, add slowly at room temperature 8.2 grams of 37% aqueous P CH formaldehyde (0.1 mol of HCHO). After the react on 2 )n 2- has ceased, raise temperature to 100 C. The reaction mass may be stopped at this point. It is a viscous watersoluble material. However, it is possible to continue heat- In addition to increasing the molecular weight by means ing under vacuum until all of the water has been elimiof aldehydes, these compounds result in the formation of nated. Cross-linking occurs 'with this procedure and care cyclic compounds. Probably both molecular weight inmust be taken to prevent insolubilization. crease and cyclization occur during the reaction. Further examples of this reaction are summarized in The following examples illustrate the reaction of carthe following table:

TABLE IX.CARBONYLATION M01 ratio Example M01 weight of Aldehyde aldehyde to Temp., C. Time polyethylenepolyethylenelmlne imlne or derlv.

900 Acetaldehyde.-. 111 3 hours. 900 do 211 90 Do. 900 .do 3:1 90 Do. 5, 000 Heptaldehyde 6:1 4 hours. 5,000 do 311 125 Do. 5,000 1:1 125 Do. 11,500 211 so 1 hour 11,500 1:1 30 Do. 11, 500 0. 511 30 D0. 20,000 6:1 140 3 hours. 20,000 511 140 Do. 20,000 do; 3:1 140 Do. 50, 000 Formaldehyde. 3: 1 1 hour 50,000 211 Do. ,000 -do 211 Do. 100, 000 Glyeeraldehyde. 6:1 125 5 hours 100,000 do 311 125 Do. ,000 2:1 125 Do. 100,000 311 120 2 hours. 100, 2:1 120 Do. 100,000 1:1 120 Do. 6-A4O. 100,000 Benzaldehyde 8:1 110 1 hour 8-A10 100,000 2:1 110 o.

- M01 ratio Example Aldehyde aldehyde to Temp., C. Time polyethylenelmine 1-O C Benzaldehyde 1:1 110 1 hour 2 0 Gly a1 3:1 100 2 hours.

211 100 Do. 111 100 Do. 311 1 hour. 2:1 D0. 111 Do. 311 4 hours. 211 130 Do. 311 100 1 hour. 211 100 Do. 1:1 100 Do. 311 0 hours 211 140 Do. 111 140 Do. 3:1 1 hour. 211 Do. 111 Do.

1 Start at 25 C. Raise to 100 C. 9 Start at 25 C. Raise to 90 C.

The following table presents specific illustration of Example Designation: Meamng compounds other than polyethylenelmme and its deriva- (19) C Carbonylated. tlves. (20) AC Acylated, then carbonylated.

TABLE IX-A.CARBONYLATION Molecular Mol ratio Example weight of Aldehyde aldehyde to Temp., Time in polypropylpolypropyl- 0. hours eneimlne eneimine 500 Beuzaldehyde 1:1 110 1 hour 500 ..do 2:1 110 D0. 500 do 3:1 110 D0. 1, 000 Salleyloldehyde. 4 1 120 Do. 1, 000 d 3:1 120 Do. 1, 000 2: 1 120 Do. 5, 000 2: 1 90 Do. 5,000 1:1 90 Do. 5, 000 0. 5:1 90 D0. 10, 000 2 1 90 Do. 10, 000 1 :1 90 Do. 10, 000 0. 5:1 90 D: 20, 000 3:1 100 2 hours 20,000 2:1 100 Do. 20,000 d0 1:1 100 Do. 40, 000 Heptaldehyde 4:1 130 3 hours 40,000 -d0 3:1 130 D0. 40, 000 do 2:1 130 Do.

Mol ratio of aldehyde to Time in Example Aldehyde polypropyl- Temp., C. hours enelmine or derivative 15-11 0 Glyceraldehyde 3:1 125 4 Heptaldehyde 2:1 125 4 1:1 100 2 yoxal 1:1 90 1 Benzaldehyde. 4:1 120 2 29-0 0 Formaldehyde 1:1 1 43-020 Acetaldehyde. 1: 1 100 2 o 2:1 100 2 3:1 100 2 1:1 130 3 2: 1 130 3 3:1 130 3 3:1 125 2 2: 1 125 2 1:1 125 2 2: 1 100 1 1:1 100 1 0. 5:1 100 1 2:1 70 1 1:1 70 1 1 Start at 25 C Raise to 100 C.

The examples presented above are non-limiting examples. It should be clearly understood that various other combinations, order of reactions, reaction ratios, multiplicity of additions, etc., can be employed. Where additional reactive groups are still present on the molecule, the reaction can be repeated with either the original reactant or another reactant.

The type of compound prepared is evident from the letters assigned to the examples. Thus, taking the branched polyamine as the starting material, the following example designations have the following meaning:

Example Designation: Meaning (1) A Acylated.

(2) A0 Acylated, then oxyalkylated.

(3) AOA Acylated, then oxyalkylated,

then acrylated.

(4) AOI-I Acylated, then oxyalkylated,

then heat treated.

(5) AX Salt or quaternary of 1).

(6) AOX Salt or quaternary of (2).

(7) AOAX Salt or quaternary of (3).

(8) AOHX Salt or quaternary of (4).

(9) O Oxyalkylated.

(10) 0A Oxyalkylated, then acylated.

(11) OH Oxyalkylated, then heat treated.

(12) K Alkylated.

(13) KX Salt or quaternary of (12).

(14) KA Alkylated, then acylated.

(15) AK Acylated, then alkylated.

(16) AKX Salt or quaternary of (15).

(17) OK Oxyalkylated, then alkylated.

(18) OKX Salt or quaternary of (17).

Example Designation: Meaning (21) KC Alkylated, then carbonylated. (22) CO Carbonylated, then oxyalkylated.

(23) U Olefinated.

(24) AU Acylated, then olefinated. (25) KU Alkylated, then olefinated. (26) KUX Salt or quaternary of (25).

USE AS A CHELATING AGENT This phase of the invention relates to the use of the compounds of our invention as chelating agents and to the chelates thus formed.

Chelation is a term applied to designate cyclic structures arising from the combination of metallic atoms with organic or inorganic molecules or ions. Chelates are very important industrially because one of the unusual features of the chelate ring compounds is their unusual stability in which respect they resemble the aromatic rings of organic chemistry. Because of the great affinity of chelating compounds for metals and because of the great stability of the chelates they form, they are very important industrially.

The compositions of this invention are excellent chelating agents. They are particularly suitable for forming chelates of great stability with a wide variety of metals.

Chelating metals comprise magnesium, aluminum, arsenic, antimony, chromium, iron, cobalt, nickel, palladium, and platinum. Particularly preferred of such metals as chelate constituents are iron, nickel, copper and cobalt.

The chelates formed from the compositions of our invention are useful as bactericidal and fungicidal agents. particularly in the case of the copper chelates. In addition the chelates can be employed to stabilize hydrocarbon oils against the deleterious effects of oxidation.

In general, these chelates are prepared by adding a suflicient amount of a metal salt to combine with a compound of this invention. They are prepared by the general method described in detail by Hunter and Marriott in the Journal of the Chemical Society (London) 1937, 2000, which relates to the formation of chelates from metal ions and salicylidene imines.

The following examples are illustrative of the preparation of chelates.

Example 1A An aqueous 0.1 mole solution of the chelating agent of Example 1A is added to an aqueous solution of 0.02 mole cupric acetate. The solution becomes darker in blue color immediately with the formation of the copper chelate. Inability of the solution to plate out copper on a clean and polished iron strip indicates that the copper is effectively removed from solution by the formation of a chelate.

Example 1-O An aqueous solution of 0.1 mole of the chelating agent of Example 1O is added to an aqueous solution containing 0.025 mole ferrous sulfate. Lack of the usual formation of a red sediment in the water subsequently due to oxidation and precipitation of iron as hydrated oxide shows the iron had been chelated while in the ferrous form by the reagent 1-0 and thus effectively removed from further reactions.

Example 1-A An aqueous solution of 0.1 mole of the chelating agent 1-A O is treated with an aqueous solution containing 0.01 mole nickelous acetate. The solution turns to a darker green indicating that a chelate type of material had been formed.

To avoid repetitive detail, chelates are formed from the above copper, iron and nickel salts and the compounds shown in the following table.

Chelating agents:

Polyethyleneimine, molecular wt 900 Polyethyleneimine, molecular wt 5,000 Polyethyleneimine, molecular wt. 11,500 Polyethyleneimine, molecular wt 20,000 Polyethyleneimine, molecular 'wt 50,000 Polyethyleneimine, molecular wt. 100,000 1A7 16-O H Polypropyleneimine, molecular wt. 500 Polypropyleneimine, molecular Wt. 1,000 Polypropyleneimine, molecular Wt 5,000 Polypropyleneimine, molecular wt 10,000 Polypropyleneimine, molecular wt 20,000 Polypropyleneimine, molecular wt 40,000 -A 17H O H FLOTATION AGENTS This phase of the invention relates to the use of the compounds of our invention in separating minerals by froth flotation, and particularly to separating metallic minerals. They provide a novel process for separating minerals or ores into their more valuable and their less valuable components, by means of a froth flotation operation to beneficiate ores, particularly of metallic minerals, by applying a specifically novel reagent in a froth flotation operation.

Froth flotation has become established as a highly useful method of recovering from ores and minerals the relatively small percentages of valuable components they contain. The general techniques is to grind the ore or mineral to such a degree that the individual grains of the valuable components are broken free of the less valuable components or gangue; make a liquid mass of such finely ground ores which mass or pulp usually contains a major proportion of water and only a minor proportion of finely-ground ore; subject such pulp to the action of a highly specific chemical reagent in a flotation machine or flotation cell in the presence of a large amount of air; and recover the valuable constituents of the ore from the mineralized froth which overflows from the flotation cellv Many variations of this basic procedure have been developed including the use of different types of flotation cells diiferent procedures of combining individual operations into diflerent flow sheets to float successively and separately a number of valuable components, etc. The chemical side of the operation has likewise been varied greatly to make such complex operations practicable. In addition to reagents adapted to collect the ore values in the froth (collectors), other reagents for improving the frothing characteristics of the flotation (frothers) or for selectively improving or retarding the flotation of individual members among the valuable components of the ore (activators or depressors) have been developed. The characteristics of the chemical reagents that have been used in the flotation operation differ greatly, until it may be said that a reagents flotation possibilities may best be determined by actual test in the process.

Our process relates to the use of the compositions of this invention as promotors or collectors, particularly in selecting acidic minerals from other ore constituents. For various reasons, including viscosity, we prefer to employ our reagents in the form of solution in a suitable solvent. In some instances, Where the compounds are water soluble, water is selected as a solvent. Where the reagent is water insoluble, various organic solvents are employed.

We prefer to use our compounds and a solvent in proportions of 1:4 and 4:1. In some instances, the best results have been obtained by the use of reagents comprising substantially equal proportions of such two ingredients. On the other hand, mixtures in the proportions of 1:9 or 9:1 have sometimes been most useful.

The solvent employed may be selected as desired. In some instances, crude petroleum oil itself is satisfactory; in other cases, gas, oil, kerosene, gasoline, or other distillate is to be preferred. We prefer specifically to employ the petroleum distill-ate sold commercially as stove oil, as it appears to have, in addition to desirable properties as used in our reagent for floating minerals, certain desirable physical properties, i.e., it is relatively stable and non-volatile. it is relatively limpid, and it is relatively non-flammable.

The flotation reagent contemplated for use in our process is prepared by simply mixing the compound of our invention and the solvent in the desired proportions. The reagent so compounded is used in the ordinary operatlng procedure of the flotation process.

In some instances, the components of the mixture are compatible and combine into a perfectly homogeneous liquid reagent. In other instances, they are more or less incompatible, and tend to separate or stratify into layers on quiescent standing. In instances where the ingredients are capable of making a homogeneous mixture, the reagent may be handled and used without difiiculty. If a non homogeneous mixture results when the desired proportions are employed, a number of expedients may be resorted to obviate the difliculty. For example, since it is common to include the use of a frothing agent in many flotation operations, the collector which comprises our reagent may be homogenized by being combined with a mutual solubilizer in the form of the desired frother, e.g., cresylic acid, pine oil, terpineol, one of the alcohols manufactured and used for froth promotion, like the duPont alcohol frothers, etc. If such mutual solubilizer is incorporated in or with the compounds and petroleum body, as above described, the resulting reagent is also contemplated by us for use in our process.

Another means of overcoming the non-homogeneity of some of the examples of the reagents contemplated by us is to homogenzie the mixture mechanically, as by a beater or agitator, immediately before injecting it into the mineral pulp which is to be treated for the recovery of mineral values.

The reagents of the present invention are effective promoters or collecting agents for acidic ore materials generally and said acidic materials may be either worthless gangue or valuable ore constituents. The most important use, however, is in connection with the froth flotation of silica from non-metallic ores in which the siliceous gangue may represent a much smaller proportion of the ore rather than metallic and sulfide ores in which the gangue usually represents the major proportion of the ore. Representative acidic ore materials are the feldspars, quartz, pyroxenes, the spinels, blotite, muscovite, clays, and the like.

Although the present invention is not limited to the treatment of any particular ore materials, it has been found to be well suited for froth flotation of silica from phosphate rock, and this is a preferred embodiment of the invention. In the processes of removing silica from phosphate rock the conditions are such that practically complete removal of the silica must be accomplished in order to produce a salable phosphate material. It is therefore an advantage of this invention that our reagents not only effect satisfactory removal of the silica but are economical in amounts used. For example, the quantities of active compounds required range from 0.1 pound to 2.0 pounds or more, but preferably 0.2 to 1.5 pounds, per ton of ore depending upon the particular ore and the particular reagent. The invention is not, however, limited to the use of such quantities.

These reagents can also be used for the flotation of feldspar from quartz and for the flotation of mica from quartz and calcite.

The reagents of the present invention can be used alone or in mixtures with other promoters. They can likewise be used in conjunction with other cooperating materials such as conditioning reagents, activators, frothing reagents, depressing reagents, dispersing reagents, oily materials such as hydrocarbon oils, fatty acids or fatty acid esters.

The present reagents are also adaptable for use in any of the ordinary concentrating processes such as film flotation, tabling, and particularly in froth flotation operations. The ore concentrating processes employed will depend upon the particular type or kind of ore which is being processed. For example, in connection with phosphate, rock, relatively coarse phosphate-bearing materials, for example 28 mesh or lar er. can be e o omically concentrated by using these reagents in conjunction with other materials such as fuel oil or pine oil in a concentration process employing tables or film flotation. The less than 28 mesh phosphate rock material is best concentrated by means of froth flotation employing these improved silica promoters.

When the reagents of the present invention are employed as promoters in the froth flotation of silica from phosphate rock the conditions may be varied in accordance with procedures known to those skilled in the art. The reagent can be employed in the form of aqueous solutions, emulsions, mixtures, or solutions in organic solvents such as alcohol and the like. The reagents can be introduced into the ore pulp in the flotation cell without prior conditioning or they can be conditioned with the ore pulp prior to the actual concentration operation. They can also be stage fed into the flotation circuit.

Other improved phosphate flotation features which are known may be utilized in connection with the present invention.

While the above relates specifically to the flotation of silica from phosphate rock, the present invention is not limited to such operations and the reagents are useful in the treatment of various other types of ore materials wherein it is desirable to remove acidic minerals in the froth. For example, the reagents are useful in the treatment of rake sands from the tailings produced in cement plant operations. In this particular instance, the rake sands are treated by flotation to remove part of the alumina which is present in the form of mica and the removal of silica is not desirable. Our reagents are useful in such flotation operations. The reagent may also be used for the flotation of silica from iron ores containing magnetite, limonite and quartz, and in tests conducted on this type of ore, the rough tailing resulting from the flotation of silica containing both magnetite and limonite assayed much higher in iron than concentrates produced by the conventional soap flotation of the iron minerals.

Some 10 million tons of phosphate rock are produced annually from the Florida pebble phosphate deposits. L0- cated principally in Polk and Hillsborough Counties, these marine deposits produce three-fourths of the US. supply of phosphate and about three-eighths of the world supply.

Such pebble phosphate, as mined by the conventional strip-mining methods, includes undesirably large proportions of non-phosphate minerals, principally siliceous and principally silica, which reduce the quality and the price of this large-tonnage, small-unit-value product. Extensive and costly ore-dressing plants have consequently been required to deliver a finished product of acceptable grade.

Among the procedures employed, and one which is almost universally used by the industry, is a two-stage or double flotation process. In the first stage (or rougher flotation circuit), washed phosphate rock having particle sizes usually between about 28- and about ISO-mesh is subjected to the action of a reagent conventionally comprising tall oil, fuel oil, and caustic soda. The concentrate delivered by such rougher circuit is a phosphate rock of grade higher than the original rock but which still contains too much silica and similar impurities to be of acceptable market grade.

The rougher concentrate is therefore dc-oiled with dilute sulfuric acid to remove the tall-oil-soap-and-fueloil reagent and is thereafter subjected to flotation in a secondary or cleaner flotation circuit. The froth product delivered from this secondary circuit is high in silica and similar impurities and is desirably low in phosphate values so that it can be thereafter discarded.

Our process is particularly applicable to such secondary or cleaner flotation circuit of such a conventional flotation scheme. Our process may, of course, be applied to beneficiate a phosphate rock that has not been subjected to such preliminary rougher circuit flotation process.

Because our compounds are most advantageously used in conventional flotation plants in the phosphate rock industry, and in the secondary-circuit or cleaner-circuit section of such plants, it is not necessary here to describe in detail how they are used. Where they are employed, the operation of the plant is continued in normal fashion, the only change being the substitution of our compounds for the conventional reagents otherwise used.

'For sake of completeness, the following brief example of their use is presented.

EXAMPLE A typical Florida pebble phosphate rock is subjected to conventional preflotation treatment and sizing. That portion having a particle-size range of from about 28- to about ISO-mesh is processed through a conventional rougher flotation circuit employing the conventional tal'l oil, fuel oil, and caustic soda reagents to float a phosphate rock concentrate. The concentrate delivered from such rougher circuit contains 12-14% insoluble matter, after deoiling with dilute sulfuric acid andwashing with Water. In the consequent secondary flotation circuit the compounds of the table below are used at a rate of about 0.85 pound per ton of rougher concentrate.

Aeration is started, additional Water being added to the cell as required to maintain the proper level as the froth is continuously skimmed ofi. The collected overflow and tailings are analyzed. The overflow froth is high in silica and low in bone phosphate of lime while the tailing in the underfiow are low in silica and high in bone phosphate of lime.

By employing this process with the agents listed below one obtains a phosphate of marketable grade separation of the bone phosphate of lime with these compounds is more eflicient than with the conventional agents.

Flotation agents:

Polyethyleneimine, molecular wt. 900 Polyethyleneimine, molecular wt. 5,000 Polyethyleneimine, molecular wt. 11,500 Polyethyleneimine, molecular wt. 20,000 Polyethyleneimine, molecular wt. 50,000 Polyethyleneimine, molecular wt. 100,000

Polypropyleneimine, molecular wt. 500 Polyethyleneimine, molecular wt. 1,000 Polypropyleneimine, molecular wt. 5,000 Polypropyleneimine, molecular wt. 10,000 Polypropyleneirnine, molecular wt. 20,000 Polypropyleneimine, molecular wt. 40,000

1. In the froth flotation process for benetficiating ore material containing siliceous material the step comprising subjecting the ore material to froth flotation in the pres ence of a minor amount of a collector selected from the group consisting of (1) a linear polymer of a 1,2-alkyleneimine, said polymer having a molecular Weight of at least 800, each alkylene unit having 2 to 20 carbon atoms,

(2) an olefinated linear polymer of a 1,2-alkyleneimine,

said polymer having a molecular weight of at least 800, each alkylene unit having 2. to 20 carbon atoms, formed by reacting, at a temperature of from about 70 C. to about 100 C., said polymer with an ole-- finating agent selected from the group consisting of acrylonitrile, styrene, butadiene, vinyl ethers and vinyl sulfones,

(3) a Schiff base reaction product of a linear polymer of a 1,2-alkyleneimine, said polymer having a molecular weight of at least 800, each alkylene unit having 2 to 20 carbon atoms, formed by reacting said polymer with a compound selected from the group consisting of aldehydes and ketones,

(4) a Schiff base reaction product of an acylated linear polymer of a 1,2-alkyleneimine, said polymer having a molecular weight of at least 800, each alkylene unit therein having 2-20 carbon atoms, formed by reacting, at a temperature of from about 120 C. to about 300 C., said polymer with an acylating agent selected from the group consisting of (i) a carboxylic acid having 7-39 carbon atoms and (ii) a precursor of said carboxylic acid capable of forming said acid in said reaction, and then reacting said acylated :polymer with a compound selected from the group consisting of aldehydes and ketones,

(5) a Schifl base reaction product of an alkylated linear polymer of a 1,2-alkyleneimine, said polymer having a molecular Weight of at least 800, each alkylene unit therein having 2-20 carbon atoms, formed by reacting, at a temperature of from about 100 C. to about 250 C., said polymer with a hydrocarbon halide alkylating agent having 1-30 carbon atoms, and then reacting said alkylated polymer with a compound selected from the group consisting of a1- dehydes and ketones,

(6) an oxyalkylated Schiff base reaction product of a linear polymer of a 1,2-alkyleneirnine, said linear polymer having a molecular weight of at least 800, each alkylene unit therein having 2-20 carbon atoms formed by reacting said linear polymer with a compound selected from the group consisting of aldehydes and ketones to form said Schifl? base reaction product and then reacting said Schifl base reaction product, at a temperature of from about C. to about 200 C. and a pressure of from about 10 p.s.i. to about 200 p.s.i., with an alkylene oxide having at least 2 carbon atoms,

(7) an acylated, then olefinated linear polymer of a 1,2-alkyleneimine, said polymer having a molecular weight of at least 800, each alkylene unit therein having 2-20 carbon atoms, formed by reacting, at a temperature of from about 120 C. to about 300 C., said linear polymer with an acylating agent selected from the group consisting of (i) a carlbo-xylic acid having 7-39 carbon atoms and (ii) a precursor of said carboxylic acid capable of forming said acid in said reaction, and then reacting said acylated polymer, at a temperature of from about 70 C. to about C., with an olefinating agent selected from the group consisting of acrylonitrile, styrene, butadiene, vinyl ethers and vinyl sulfones, and

(8) an alkylated, then olefinated linear polymer of a 1,2-alkyleneimine, said polymer having a molecular weight of at least 800, each alkylene unit therein having 2-20 carbon atoms, formed by reacting, at a temperature of from about 100 C. to about 250 C., said polymer with a hydrocarbon halide alkylating agent having from 1-30 carbon atoms, and then reacting said alkylated polymer, at a temperature of from about 70 C. to about 100 C., with an olefinating agent selected from the group consisting of 39 acrylonitrile, styrene, butadiene, vinyl ethers and vinyl sulfones.

2. The process of claim 1 wherein the compound is a linear polymer of a 1,2-alkyleneimine, said polymer having a molecular weight of at least 800, each alkylene unit having 2 to 20 carbon atoms.

3. The process of claim 1 wherein the compound is an olefinated linear polymer of a 1,2-alkyleneimine, said polymer having a molecular weight of at least 800, each alkylene unit having 2 to 20 carbon atoms, formed by reacting, at a temperature of from about 70 C. to about 100 C., said polymer with an olefinating agent selected from the group consisting of acrylonitrile, styrene, butadiene, vinyl ethers and vinyl sulfones.

4. The process of claim .1 wherein the compound is a Schitf base reaction product of a linear polymer of a 1,2-alkyleneimine, said polymer having a molecular weight of at least 800, each alkylene unit having 2 to 20 carbon atoms, formed by reacting said polymer with a compound selected from the group consisting of aldehydes and ketones.

5. The process of claim 1 wherein said linear polymer of a 1,2-alkyleneimine is a polyethyleneimine.

6. The process of claim 2 wherein said linear polymer of a 1,2-alkyleneimine is polyethyleneimine.

7. The process of claim 3 wherein said linear polymer of a 1,2-alky1eneimine is polyethyleneimine.

8. The process of claim 4 wherein said linear polymer of a 1,2-alkyleneimine is lpolyethyleneimine.

9. The process of claim 1 wherein said linear polymer of a 1,2-alkyleneimine is polyethyleneimine.

10. The process of claim 2 wherein said linear polymer of a 1,2-alkyleneimine is polyethyleneimine.

11. The process of claim 3 wherein said linear polymer of a 1,2-alkyleneimine is polyethyleneimine.

12. The process of claim 4 wherein said linear polymer of a 1,2-alkyleneimine is polyethyleneimine.

40 13. The process of claim 1 wherein said ore material is phosphate rock and said siliceous material is silica.

14. The process of claim 2 wherein said ore material is phosphate rock and said siliceous material is silica.

15. The process of claim 3 wherein said ore material is phosphate rock and said siliceous material is silica.

16. The process of claim 4 wherein said ore material is phosphate rock and said siliceous material is silica.

17. The process of claim 5 wherein said ore material is phosphate rock and said siliceous material is silica.

18. The process of claim 6 wherein said ore material is phosphate rock and said siliceous material is silica.

19. The process of claim 7 wherein said ore material is phosphate rock and said siliceous material is silica.

20. The process of claim 8 wherein said ore material is phosphate rock and said siliceous material is silica.

21. The process of claim 9 wherein said ore material is phosphate rock and said siliceous material is silica.

22. The process of claim 18 wherein said ore material is phosphate rock and said siliceous material is silica.

23. The process of claim 11 wherein said ore material is phosphate rock and said siliceous material is silica.

24. The :process of claim 12 wherein said ore material is phosphate rock and said siliceous material is silica.

References Cited UNITED STATES PATENTS 2,182,306 12/1939 Ulrich 2602 2,272,489 2/ 1942 Ulrich 2602 2,296,225 9/1942 Ulrich 260-2 2,857,331 10/ 1958 Hollingsworth 209l67 HARRY B. THORNTON, Primary Examiner.

R. HALPER, Assistant Examiner. 

